Improvement in shingle-sawing machines



' 3 Sheets-Sheet 1. G. OHALLONER.

Shingle-Sawing Machine. No. 214,490. Patented April 22,1879.

N.PETERS. PMOTO-LJTHOGRAPHER WASHINGTON. D. C

. 3 Sheets-Sheet 2 A G. OHALLONER. Shingle-SawingMachine, No, 214,490.Patented April'22, 1879.

N. FErERs, PHOTO LITHO 8 Sheets-Sheet B.

GFOHALL ONER. Shingle-Sawing Machine. N0. 214,490. I Patented April22,1879.

IJV'VEJVTOR By Jlttorney N. PETERS, FHOTO-LITHOGRAPHER, WASHINGTON. D. c

UNITED STATESPATENT OFFICE...

GEORGE OHALLONER, OF OMRO, WISCONSIN.

IMPROVEMENT IN SHINGLE- -SAWING MACHINES.

Specificatwnforming part of Letters Patent No. 214,490, dated April 22,1879; application filed November 21, 1878.

To all whom it may concern:

Be it known that I, GEORGE -OHALLONER, of Omro, in the county ofWinnebago and State of Wisconsin, have invented certain new and usefulImprovements in Machines for Sawing Shingles; and I do hereby declarethe following to be a full and exact description of the same, referencebeing had to the accompanying drawings, forming part of thisspecification, in which- Figure 1 is a top or planv view of my improvedmachine. Fig. 2 is a side elevation of the same. Fig. 3 is a transversesection, showing the mechanism for adjusting the inclina-, tion of thebolts with respect to the saw, and also the means for regulating thethickness of the shingles.

Similar letters of reference in the accompanyin g drawings denote thesame parts.

My invention relates to improvements in that class of machines forsawing shingles in which two reciprocating carriages are employed inconnection with a common saw located between them; and it consists,primarily, in mechanism for imparting a variable speed to thereciprocating carriages, whereby they are alternately slowly fed oradvanced to the saw and quickly returned therefrom; and, secondly, incertain improved means for holding and adjusting the bolts so as toimpart to the shingles any desired thickness or bevel, all as I will nowproceed to describe.

In the accompanying drawings, A represents the frame of the machine,constructed preferably of metal; B B, the guides or ways for thecarriages; G O, the carriages, and D the saw. E E are yokes or levers,fulcrumed at opposite sides of the frame of the machine at e, andconnected to the carriages G C, respectively, by means of rods F F.These levers are each provided with a longitudinal slot, G, in whichworks a crank, H, secured to a vertical shaft, I. When the crank isrotated it plays back and forth in the slots, imparting to the levers avibrating motion,

which, in turn, is communicated to the carriages by the rods beforementioned.

It will be observed that as the carriages are alternately fed forward tothe saw the crank H travels toward the outer end of the slots in theirrespective operating levers and away from the fulcrums c e, andconsequently the leverage or power exerted upon said levers is increasedand the speed correspondingly lessened, while on the return movement thecrank travels in the slots toward the fulcrums,

and thereby exerts a shorter leverage, and

causes the carriages to move faster. A slow i feed and rapid return arethus effected. f

v The operating-rods F F are adjustably connected to the carriages bymeans of slotted 1 plates ff and set-screws c c. The lower end of theshaft I is provided with a gear-wheel, J, which meshes with a pinion, K,on the pulleyshaft L.

A belt is passed loosely around the pulley M on the shaft L and around apulley, N, on This belt is tightened or loosthe saw-arbor. ened, tothrow the machine into or out of operation, by means of atightening-pulley, O,

mounted in suitable guides and adapted to be adjusted back and forth bymeans of a rack and pinion, m n, or by any other suitable means. Eachcarriage is provided with jaws P P for holding the bolts, the former ofwhich are adapted to be set at any desired point by means of a lever,17, rodq, and screw rr, while the latter are arranged to clamp the boltby spring-pressure in the following manner: A

lever, t, pivoted to the carriage, is articulated at its inner end tothe rear of the jaw P, and provided at its outer end with afriction-roller, s,

The tension of the rod u, and spring '0. spring o keeps the outer end ofthe lever forced back, and causes the jaw P to tightly grasp the bolt.As the carriage returns from the saw the roller s engages with a cam 7arm, w, and causes the outer end of the lever to be moved inward and theclamp P to be removed from the bolt, the latter dropping on a grated bedor support, Q, in position for being again A is arranged a rod or bar,W, havin a flat end, which rests upon the roller U, an is provided'with,an oblong slot for the passage of the end of the shank B. This rod, inturn, is jointed to one end of a lever, X, fulcrumed on the sideof theframe of the machine. The opposite end of said lever is provided with afriction-roll, and works in a cam wheel, Y, mounted on a stud on theguideway.

A series of studs or teeth, y, are arranged on the periphery of thecam-wheel, with which a gravitating pawl, Z,'located on an armprojecting from the carriage, is adapted to engage. By this arrangementthe forward movement of the carriage causes the pawl to turn thecam-wheel the distance of one tooth and the lever X to vibrate the rodW, and thus move the lower end of the shank R and tilt the support Q tothe right or left. The box T on the cross piece A is provided with anoblong opening, t, to allow of the proper play to the shank, and withadj ustin g-screws s s, to limit the extent of such play.

To regulate the thickness of shingles cut from the bolt, the lever V,which supports the lower end of the shank, is made vertically adjustableby means of a screw-rod and nut, R N, or other equivalentmeans.

The operation of the machine is as follows: A bolt of timber is placedupon each of the supports Q, between the jaws P P. Motion is thenimparted to the saw by means of a belt applied to a pulley, H, on itsarbor. The belt-tightening pulley is next adjusted up, so as to tightenthe belt which passes around the lower pulley on the arbor and the largepulley M, and, through the medium of the beforedescribed gearing, thecrank H is rotated, thus causing the vibration of the levers E E and theconsequent reciprocation of the carriages. From the peculiar arrangementof the crank, slotted levers, and connecting-rods, the carriages arealternately fed forward at a moderate speed, the saw each time severinga section from the bolt. In said forward movement the gravitating pawlsengage with the cam-wheels, causing the latter to vibrate the levers Xand the rods W, and thus move the shanks B, so as to tilt the beds orsupports in a direction opposite to that previously occupied by them.After the cuts are made the carriages return quickly to their firstpositions. When near the limit of their backward movement thespring-levers t strike the cam-plates on the guides and release thebolts from the jaws P P, thus allowing them to drop back again upon thesupports Q to adjust themselves in position for being again clamped andcarried forward to the saws for the next operation.

In order that the attendant may cause the machine to out a succession ofspindles from the bolts with their butts all one, way, I provide twocross shaft-s or rods, R R, having their hearings in the main frame, asshown, and each having a right-angular arm, R at one end, and a handwheel or crank, R at the other end.

The point of the arm R is adapted to engage with the teeth on thecam-wheels to turn the latter, as I will now proceed to explain.

After the carriage has moved up to the saw, and is returning, thehand-wheel R is turned, so that the arm on the end of the shaft bearsupon one of the teeth of the cam-wheel, causing the latter to be turnedbackward one tooth, so that when the carriage is again fed forward thepawl thereon will simply act upon the same tooth previously moved by it,and maintain the same relative position of the bed carrying the bolt.Stops S S are arranged on opposite sides of the arm R for the purpose oflimiting the degree of movement of said arm.

The object of this mode of cutting is to maintain the proper run of thegrain in the article severed, and also to produce as little waste aspossible. 7

Having thus described my invention, Iclaim as new- 1. The combination ofthe slotted levers or yokes E E, pivoted at opposite sides of the frame,and connected by rods F F to the reciprocatin g carriages (l O, with thesingle crank H working in the slots of both of the levers, whereby thecarriages are alternately fed slowly forward to the saw and quicklyreturned therefrom, substantially as described.

2. The beds or supports Q Q, having the shank R, combined with theuniversal-joint support S S, the reciprocating bar W, and the roller U,substantially as described.

3. The box T, arranged upon the cross-piece A having the oblong openingt and adjusting-screws s s, for the purpose of limiting the play of theshank and giving the desired inclination to the bed, substantially asdescribed.

4. The beds or supports Q Q, rendered vertically adjustable to regulatethe thickness of the shingles by means of the levers V and screw rodsand nut R N, substantially as described.

5. The combination of the pawls Z, camwheels Y, levers X, and bar W withthe shank of the bed, substantially as described.

6. The shafts R R, having the arms R and wheels or cranks R incombination with the toothed cam-wheels, substantially as described, forthe purpose specified.

GEORGE OHALLONER.

Witnesses JOHN GHALLoNER, GEO. H. HoLMEs.

